Game of Thrones 8 Episode 5: Arya Stark's new mysterious horse at King's Landing becomes a hot topic on Twitter

Game of Thrones 8 Episode 5 sent shockwaves among GoT enthusiasts, especially after the firestorm brought about by Daenerys Targaryen as she burnt down the whole of King's Landing. But there's another unanswered question from the episode that has left Twitter talking about it...